Unconventional spin dynamics in the honeycomb-lattice material α−RuCl3: High-field electron spin resonance studies
A. N. Ponomaryov, E. Schulze, J. Wosnitza, P. Lampen-Kelley, A. Banerjee, J.-Q. Yan, C. A. Bridges, D. G. Mandrus, S. E. Nagler, A. K. Kolezhuk, and S. A. Zvyagin https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.121117